Add lib_microdroid_signature_proto with proto-full

This is used by apexd, which is already using proto-full for other proto
files.

Ignore-AOSP-First: The changes of system/apex need to avoid in S

Bug: 184605708
Bug: 181093750
Test: atest MicrodroidTestCase
Merged-In: I341544fdf318c6cae22f643b6c2904def0919f74
Change-Id: I341544fdf318c6cae22f643b6c2904def0919f74
(cherry picked from commit 6fea59320616702a66df59c2c687480130a1503f)
diff --git a/microdroid/signature/Android.bp b/microdroid/signature/Android.bp
index 63c2128..91d732b 100644
--- a/microdroid/signature/Android.bp
+++ b/microdroid/signature/Android.bp
@@ -17,6 +17,15 @@
 }
 
 cc_library_static {
+    name: "lib_microdroid_signature_proto",
+    proto: {
+        export_proto_headers: true,
+        type: "full",
+    },
+    defaults: ["microdroid_signature_default"],
+}
+
+cc_library_static {
     name: "lib_microdroid_signature_proto_lite",
     recovery_available: true,
     proto: {